English verb conjugation
COULD RIFLE

Regular verb: rifle - rifled - rifled

Affirmation

Simple form	V-ing form
I could rifle you could rifle he could rifle we could rifle you could rifle they could rifle	I could be rifling you could be rifling he could be rifling we could be rifling you could be rifling they could be rifling
Perfect	V-ing perfect
I could have rifled you could have rifled he could have rifled we could have rifled you could have rifled they could have rifled	I could have been rifling you could have been rifling he could have been rifling we could have been rifling you could have been rifling they could have been rifling

Negation

Simple form	V-ing form
I couldn't rifle you couldn't rifle he couldn't rifle we couldn't rifle you couldn't rifle they couldn't rifle	I couldn't be rifling you couldn't be rifling he couldn't be rifling we couldn't be rifling you couldn't be rifling they couldn't be rifling
Perfect	V-ing perfect
I couldn't have rifled you couldn't have rifled he couldn't have rifled we couldn't have rifled you couldn't have rifled they couldn't have rifled	I couldn't have been rifling you couldn't have been rifling he couldn't have been rifling we couldn't have been rifling you couldn't have been rifling they couldn't have been rifling

Interrogative form

Simple form	V-ing form
could I rifle? could you rifle? could he rifle? could we rifle? could you rifle? could they rifle?	could I be rifling? could you be rifling? could he be rifling? could we be rifling? could you be rifling? could they be rifling?
Perfect	V-ing perfect
could I have rifled? could you have rifled? could he have rifled? could we have rifled? could you have rifled? could they have rifled?	could I have been rifling? could you have been rifling? could he have been rifling? could we have been rifling? could you have been rifling? could they have been rifling?

Interro-negative form

Simple form	V-ing form
couldn't I rifle? couldn't you rifle? couldn't he rifle? couldn't we rifle? couldn't you rifle? couldn't they rifle?	couldn't I be rifling? couldn't you be rifling? couldn't he be rifling? couldn't we be rifling? couldn't you be rifling? couldn't they be rifling?
Perfect	V-ing perfect
couldn't I have rifled? couldn't you have rifled? couldn't he have rifled? couldn't we have rifled? couldn't you have rifled? couldn't they have rifled?	couldn't I have been rifling? couldn't you have been rifling? couldn't he have been rifling? couldn't we have been rifling? couldn't you have been rifling? couldn't they have been rifling?